I use ip route and it seems to work ok for me.  To check you can use
iptraf (written by a fellow filipino gerald java)..


On 7/6/09, Alec Joseph Rivera <[email protected]> wrote:
> Winelfred G. Pasamba wrote:
>> i'm been trying this "ip route add ... equalize..." thing. sometimes
>> it works, sometimes it doesn't.
>>
> The thing with this is if you're testing from a single station you won't
> see much. But if you have many stations, looking at the outbound routes
> will show you that it works. It doesn't make sense for the router to
> keep on switching gateways, even if say gateway A is unresponsive for a
> while (not that long). It's the way IP works, it allows for delay. Try
> to get around this mechanism is usually not a good idea. Normal users
> won't notice a lot of disruption on the traffic anyway if setup correctly.
>> however failover is automatic and looks like it works. i can unplug
>> any of the routers and after some time all the pings to different
>> hosts work again. (dead route detection)
>>
>> i also see pings to google going out of routerA and pings to facebook
>> going out of routerB, which means routes are distributed.
>>
>> despite of successful pings i can't telnet to port 80 of google or
>> facebook, and i wonder why?
>>
>>
> TCP Sessions are the key here and complicates the setup a bit. This is
> related to what the target sees on the source ip of the packets. You
> should look at netfilter's conntrack and packet mangling capability.
>
>>
>>
>> On Fri, Jul 3, 2009 at 7:22 PM, Alec Joseph Rivera<[email protected]>
>> wrote:
>>
>>> Try looking for LARTC on googs. It's got a lot of examples to help you
>>> achieve what you want.
>>>
>>> Agi
>>>
>>> Nelson Serafica wrote:
>>>
>>>> I have 2 isp provider (ISPA and ISPB) and I have 1 machine. The 2 isp
>>>> provide a modem/router and both of them hook up on the same switch. I
>>>> called it "PUBLIC SWITCH". My web server was connected also on the
>>>> PUBLIC SWITCH and use ISPA provided ip address and its gateway.
>>>>
>>>> What I want to do is also use ISPB on the same server. I have only 2 NIC
>>>> (1 on PUBLIC SWITCH and 1 on my private network) on my webserver. But
>>>> since it was connected on the PUBLIC SWITCH, I can use ISPB.
>>>>
>>>> I put ip address provided by ISPB as virtual (ifcfg-eth0:1) and the
>>>> metric gateway was 1. But I think this won't work as expected.
>>>>
>>>> Is there a way wherein I can use both ISP and their provided ip block on
>>>> my web server (just like a router)? My client is on a tight budget and
>>>> don't want to purchase another machine just for a load balancer. But
>>>> purchasing another NIC card is ok.
>>>>
>>>> The OS is CentOS 5.3 with kernel 2.6.18-128.el5. Upon Googling, there is
>>>> a patch on the kernel on how to do this but it seems old. Just asking a
>>>> recommendation on the list who is expert to this.
>>>> _________________________________________________
>>>>
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>>
>
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